Legume nodules

Lopez, M., Carbonero, V., Cabrera, E. and Ruiz-Argiieso, T. (1983) Effects of host on the expression of the H2-uptake hydrogenase of Rhizobium in legume nodules. Plant Set. Lett., 29, 191-9. 

Jain, V. and Nainawatee, H.S., Plant flavonoids signals to legume nodulation and soil microorganisms, J. Plant Biochem. Biotechnol, 11, 1, 2002. 

Legume nodules and cyanobacterial heterocysts 1388 4. Metabolism of Homocysteine and Methionine... 

Dilworth, M. Glenn, A. (1984). How does a legume nodule work Trends in Biochemical Sciences 9, 519-23. 

Rolfe, B.G. Gresshoff, P.M. (1988). Genetic analysis of legume nodule initiation. Annual Review of Plant Physiology and Plant Molecular Biology 39, 297-317. 

S. R. Long, Rhizobium legume nodulation—life together in the underground, Cell, 56 (1989) 203-214. 

Figure 1. Schematic of the processes of dinitrogen reduction and NH assimilation within infected cells of legume nodules...

Utilize in nitrogen fixation. Until more data are available we can only guess as to whether nonsymbiotic bacteria or legume nodules are the main source of the apparently abundant nitrogen supply found in the Tropics. 

Iron is a constituent of hemoglobin that occurs not only in the red blood cells of vertebrates but also in effective nodules. In animals it acts primarily in the transport of oxygen from the lungs to the tissues of the body. Its exact role in legume nodules is not known but the hemoglobin seems to play a part, either direct or indirect, in the symbiotic fixation process. 

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